Upgraded power cord to fit my Vandersteen5A's

I recently purchased a pair of Acoustic Zen power cords to upgrade from the stock PC's that come with the 5A's. The problem is that the end that fits into the amp will not fit in because of the heat fins obstructing the larger female connector. Has anyone out there with Vandersteen 5A speakers found an upgraded PC that will fit, and also was it worth the upgrade. Thanks